Another flywheel question.

hi, normal flywheel diameter is 13.25 inches for 130 tooth wheel. std for A body small blocks. the 273 is 12.3 inches. truck flywheels are 14 ,4 inches dia.
10.5 and 10.95 clutches have same bolt pattern. which is what small blocks are. drill 318 wheel to match 360, and it will work just wonderful. I have drilled neutral balance flywheels to fit 360 motors. there was no vibration.